I am only vaguely familiar with the CA form 592-B. I can recall this issue occurring a few years ago. I also recall the the "answer" was that you have to go into forms mode to enter that 529-B into the California Estate Tax Return, Form ET-1. But I don't recall which specific worksheet in the program where you have to enter the tax information from the 592-B if section 3 box c is checked.
